Tumbling barrel



Ju'ly 24, 1928. F. w. NEvlLLE TUMLING BARREL Filed Nov. 50, 1925 2Sheets-Sheet F. w. NEVILLE TUMBLING BARREL 'Filed Nov. so, 1925 2sheets-sneer 2 Fig 5.

patented .lilly 24, 19.28.

yuuiran stares FREDERICK lli/'ALTER NEVELLE, OF

.Lronn ENGLAND, AssIGNoR 1ro J. W. .inclinan & COMPANY LILIVII'IIEL'D7OF VULCAN NOR-KS, SALFORD, ENGLAND.

TUMBLING BARREL.

Application filed November 30, 1925,` Serial No.

AThis linvention relates to tumbling barrels with or Withouta sand blastadapted to Aclean 'foundry castings after being taken from the nilo-uldsor other articles and its object is to 5 )provide for the extraction orremoval from the barrel of the abrasive material, tailings -and dust. j

Tu'inblin barrels for foundry castings -'and other articles hitherto`constructed have .in ecomprised a mechanically rotated, perforated'drinn into which a jet of abrasive is projected through one end on toarticles contained by 'the barrel. `Spent abrasive, foundry-sand,taili-ng and dust fall through the lbarrel perlxforations vinto anenclosing casing and are 'collected either pneumatically or mechanicallyythe drum being supported and driven inside the casing by rollers whichare con 'sequently Working under bad conditions With lconsequent heavyWear.

Another construction comprises a double barrel, the sand passing throughperforajtions inthe inner barrel being collected ready for re-use intheouter one.

According to the` invention the barrel kis AAconstructed with a conicalouter barrel Which it rotates Will cause the loose material to flowitowards one end, a cylindrical perforated inner barrel to receive thecastings or :io articles to be cleaned, two end casings be- 1tveenwhichthe barrels are clamped, one fitted 'with an inlet nozzle andthe other with lan outlet chamber rotating with the barrel to :receivefthe loose material and discharge it through a. hollow1 central trunnionor passage land aneXtcrior chamber preferably perfolratedtolact as asieve or screw into which the .ff-peut abrasive material, sand andtailings are finally dscl'iarged.

The inventionwillbe fully described With reference to the accompanyingdrawings.

Fig. l is a longitudinal section through the apparatus.

Fig. Q. is a transverse section. V

Fig. 3 is a section through the end casing and chamber on line 3-3 Fig.l.

Fig. 4t. is a front elevation of steel end plate.

Fig. 5 is a sectional elevation of discharge end or cabinet when asuction system `is applied tothe apparatus.

The tumbler barrel is built up of a conical outer barrel A of sheet orplate metal and a cylindrical perforated inner barrel B, the barrelsbeing` clamped between and rotating 72,416, and in Great BritainFebruary vs, 1925.

yWith end castings C and D by bolts .or studs a, the end C being `fittedWith an injection nozzle E projecting through an aperture rtherein andthe end D formed with a chamber l into which the spent abrasive sand andtailings are discharged from the .outer barrel A.

` The discharge chamber Z is of annulary or spiral forni opening througha radial part d1 into a hollow trunnion or passage ,and nis Afitted on.its inner face with a steel plate F which closes the end of the innerbarrel B but is provided With annular slots f, forming openings betweenthe outer conical .bar-

rel A and the dischargechamber ci. The dis charge chamber orpassagefcZ-Z1 andthe hollow :trunniond2 are so shaped that `.materialsuch 4as sand iwill be raised-and Vfall through the radial passage clland be delivered out of the 4front of theytrunnion.

The perforated inner barrel B is `fitted into agroove c :in .the nozzlelend ycasting :C and into a groove fl in the end plate F metal. lto

metal and the conical outer barrel is fitted into .a groove@2inithegnozzle end casting and into aA groove 72 intheplate F, the groovec2 Sbeing preferably tit-ted with a rubber or leatherring tomake-adust-tight seal at-the nozzleiend ofthe apparatus.

The barrels A and B are provided with `apertures fitted with doors nl,b1 Vthrough which access may behad yto the 4interior of theconicalrinner barrel B for iplacing and removing'the articles to becleaned.

The doors comprise van `inner perforated plate b1 conforming tothecontour ofthe barrel B and an outer plate al resting When in positiononthe barrel A,'the plates ,being connected together by distance .boltsand clamped onto the barrel A by bolts and nuts.

A coarse conical screen G designed to separate the liner sandnandabrasive from the tailings 1s aliiXed to thexexterior of the deliveryend'castingD to receive the material from the discharge passage andtrunnion all, and an outer conical casing G1 preferably revolving Withit is fitted around the conical screen G. The fine or screened materialis delivered from the casing G1 to a chute g1 and the lumps and tailingare delivered from the screen G to the chute g, situated in a dustexhaust box H.

An injector nozzle E is mounted on a bracket at the end of the barreland a dust shield K is affixed to the face of the nozzleend casting Csurrounding the aperture and rotating in close proximity to a iiange eon the nozzle E. Pitched near the periphery of the dust shield K in thecasting C a ring o1e holes /c is drilled obliquely 'to the axle of thebarrel to permit any abrasive that may splash back through the nozzleopening c to be returned. to the barrel.

The end castings C and D are turned cylindrical on their peripheries toJform treads which are supported upon and driven by four rollers M keyedto two shafts m rotating in bearings on the standards M1. To thestandard M1 a gear case M4 is tixed carrying three gears M2, M3, M2, onegear wheel M2 keyed to each of the shafts m with an intermediate gearwheel M3 between them. rIhe gear wheel M2 is driven by a pulley M5.

When the apparatus is adapted to be used with direct pressure sand blastthe dust exhaust box H is divided into two compartments by' verticalpartition Ll with a sloping base or chute g1 leading to a hole in theside of the dust box. The base of the dust box I-I is inclined to leadto a chute or outlet g. rlhe top of the box is connected by a pipe 7L toa dust exhaust fan, The exhaust box H is mounted on one of the pillarsM1.

Uien the apparatus is adapted. to be used with suction system sand blasta cabinet N (see Fig. 5) is substituted for the dust box H in which theabrasive instead of being delivered down a channel chute is collected ina central chamber a at the bottoni of which a suction system sand valveal is tted while tailings pass over to the compartment a2.

In operation abrasive is injected through the nozzle E on to objectsplaced in the perforated inner barrel B and as the barrels rotate thedust, tailings and abrasive fall through the perforations into theconical outer barrel A and slide down through the slots f in the plate Finto the discharge chamber l in the end casting D, and are dischargedfrom the hollow trunnion Z2 into the conical screen Gr. rEhe tailingsand lumps are delivered over the end of the screen G while the screenedand cleaned abrasive Jfalls on to the casing G1 and is delivered overthe end on to the chute g,

maeva being deliveredusually from there into thek which is'normallyconnected to the airtight bag or box.`

IVhat I. claim as my invention and desire to protect by Letters Patentis l. A tumbling barrel for cleaning foundry castings comprising thecombinationwith a perforated inner barrel to receive the castings, of aconical outer barrel yto collect the fine material as it falls throughthe perforations, a vcasting at one end with an aperture through whichabrasive material may be injected, a casting'at the other end providedwithy a discharge` chamber to receive the spent abrasive tailings anddust from the conical barrel and a hollow trunnion leading from thedischarge chamber through which the` tailings and dust are discharged.

.2. A tumbling barrel for cleaning foundry castings comprising thecombination with a conical outer barrel of'a cylindrical perforatedinner barrelto receive thefcastings to be cleaned through theperforations of which spent abrasive tailings and dust fall into theouter barrel, a casting at one end of the barrels, an abrasive injectortherein, a casting at the other end of the barrels `formed withdischarge passages to receive the spent abrasive, tailings and *dustvfrom the conical barrel and a hollow trunnion therein through which lthespent abrasive tailings and dust are discharged, a dust box tted overthe discharge end of the barrels and a rotary screen attached tothedischarge end casting within the dustv box to separate the finer usedabrasive rom the tailings.

In testimony whereof I have hereunto set my hand.

F. w. NEVILLE.

